I have unlocked about 5 phones. I usually just find the cheapest. You need to give them IMEI of your phone. As the unlock code is unique to each phone
@passiveeggI looked on ebay and seems T-mobile v10 not realy itsed there. did some searching oline and could not find much elese they were very costly.
i think you should NOT buy that phone. https://forum.xda-developers.com/tmobile-lg-v10/help/sim-unlock-t-mobile-lg-v10-t3279171
can try this site but you need the imei http://www.cellunlocker.net/lg-unlock.php
Public mobile does not supply the unlock code. You have to contact the original cell provider and give them the IMEI# and they will give you the unlock code. It is free in Canada I am not sure if it costs anything in the US.
This question was asked and answered more than a year ago. i'm sure that you just didn't notice that.